The actual formula for the points awarded to the winner is:

rounded to the nearest integer, with the restriction that the minimum is 10 points, the maximum is 40 points, and where d = (winner rating – loser rating) and D = 400.

Winner Rating – Loser Rating	Points for Winner	Points for Loser
540 (or more)	10	-10
520	11	-11
500	11	-11
480	12	-12
460	12	-12
440	12	-12
420	13	-13
400	13	-13
380	14	-14
360	14	-14
340	15	-15
320	16	-16
300	16	-16
280	17	-17
260	17	-17
240	18	-18
220	18	-18
200	19	-19
180	19	-19
160	20	-20
140	21	-21
120	21	-21
100	22	-22
80	23	-23
60	23	-23
40	24	-24
20	24	-24
0	25	-25
-20	26	-26
-40	26	-26
-60	27	-27
-80	27	-27
-100	28	-28
-120	29	-29
-140	29	-29
-160	30	-30
-180	31	-31
-200	31	-31
-220	32	-32
-240	32	-32
-260	33	-33
-280	33	-33
-300	34	-34
-320	34	-34
-340	35	-35
-360	36	-36
-380	36	-36
-400	37	-37
-420	37	-37
-440	38	-38
-460	38	-38
-480	38	-38
-500	39	-39
-520	39	-39
-540 (or less)	40	-40